The combination of safe, leakproof and eco-friendly ingredients is specially formulated withiron powder, vermiculite, activated carbon, etc. Once these ingredients come into contact with the oxygen, theyoxidize and produce heat in 5 seconds.

Crafted with soft, ultra thin, non-woven fabric, the foot warmer isbreathable, moisture-wickingandanti-odor, together withfull lengthdesign to provide you maximum warmth.Simply attach it under your socksto have aconstant and comforting heatfor a wide variety of uses, even foroutdoorevents like camping and hiking.

FEATURES :

Long-Last Heating :Provide up to 10 hours of maximum warmth of 60°C/ continuous warmth of 45°C for your feet in freezing days

Single-use :Better hygiene ; disposable after use with no harm to the environment

Air-Activated :Specially formulated with eco-friendly ingredients like iron powder, vermiculite, activated carbon that oxidize and produce heat in 5 seconds once you open the package

Safe, Natural Heat :Leak-proof design, just expose the warmer in the air. No need to do external heat with electric equipment or microwave